用QT库QSerialPort实现串口收发，linux QWidget C++源代码Serial，采用十六进制hex收发数据

#include <QDebug> #include "serial.h" //frandy create 20220913 Serial::Serial(QObject *parent) : QObject(parent) { mSerialPort = new QSerialPort(); connect(mSerialPort, SIGNAL(readyRead()), this, SLOT(receiveData())); } QStringList Serial::getSerialList() { QStringList serialList; //获得所有可用端口列表 QList<QSerialPortInfo> serialPortInfoList = QSerialPortInfo::availablePorts(); if(serialPortInfoList.isEmpty()){ return serialList; } QList<QSerialPortInfo>::iterator iter = serialPortInfoList.begin(); //将所有端口添加到界面的下拉列表中 while(iter!=serialPortInfoList.end()){ serialList.append(iter->portName()); iter++; } return serialList; } bool Serial::openSerialPort(QString port) { //判断串口开启状态 if(mSerialPort->isOpen()){ //若串口已经打开，则关闭它，设置指示灯为红色，设置按钮显示“打开串口” qDebug()<<"serial port has opened, then close it"; mSerialPort->clear(); mSerialPort->close(); return false; }else{ //若串口没有打开，则打开选择的串口，设置指示灯为绿色，设置按钮显示“关闭串口” qDebug()<<"serial port has closed, then open it"; mSerialPort->setPortName(port); mSerialPort->open(QIODevice::ReadWrite); mSerialPort->setBaudRate(QSerialPort::Baud19200); mSerialPort->setDataBits(QSerialPort::Data8); mSerialPort->setParity(QSerialPort::NoParity); mSerialPort->setStopBits(QSerialPort::OneStop); mSerialPort->setFlowControl(QSerialPort::NoFlowControl); return true; } } //55 AA AA AA AA AA 03 06 80 00 00 00 00 00 30 16 void Serial::sendData(QString message) { message = message.toUpper().trimmed(); QStringList hexList = message.split(" "); qDebug()<<"hexList.count:"<<hexList.count(); QByteArray byteArray; for (int i=0; i<hexList.count(); i++) { QByteArray value = QByteArray::fromHex(hexList[i].toLatin1()); qDebug()<<"value:"<<value; byteArray.append(value); } qDebug()<<"byteArray:"<<byteArray; mSerialPort->write(byteArray); } QString Serial::receiveData() { QByteArray data = mSerialPort->readAll(); qDebug()<<"recv data:"<<data<<data.length(); QString result = ""; if (hexShow) { for (int i=0; i<data.length(); i++) { QString hex_str = QString::asprintf("%02X",data.at(i)); qDebug()<<"hex_str:"<<hex_str<<hex_str.length(); if (hex_str.length() > 2) { hex_str = hex_str.mid(hex_str.length()-2); } result += hex_str + " "; } qDebug()<<"result:"<<result; } emit signReceiveMsg(result); return result; }